I like the idea of the magnet attachment, should be easily installed or removed as needed.
Would be interested in amount of backlash. Dial indicator on the fence and amount of rotation of the knob before fence reverses.
I do tapping, which can get involved with overshoot. I'd like to try making something like this from scraps just to see if the ability to gently push/pull on the fence "T" makes for accurate changes.
I could certainly see not relying on number of turns, but using the ability to smoothly move the fence in small increments along with a dial gauge, being super handy.
Like the low profile, don't want to knock it by sliding stuff off the table .